US6662721B2 - Rotary press - Google Patents

Rotary press Download PDF

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Publication number
US6662721B2
US6662721B2 US09/851,315 US85131501A US6662721B2 US 6662721 B2 US6662721 B2 US 6662721B2 US 85131501 A US85131501 A US 85131501A US 6662721 B2 US6662721 B2 US 6662721B2
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US
United States
Prior art keywords
web
preventing member
press roller
press
pinching
Prior art date
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Expired - Lifetime, expires
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US09/851,315
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English (en)
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US20010047727A1 (en
Inventor
Shinichi Fujishiro
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Komori Corp
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Komori Corp
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Assigned to KOMORI CORPORATION reassignment KOMORI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJISHIRO, SHINICHI
Publication of US20010047727A1 publication Critical patent/US20010047727A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/20—Safety devices preventing damage

Definitions

  • This invention relates to a rotary press for printing a web, and more specifically, to a rotary press adapted to prevent entrainment of a web during plate changing.
  • this type of rotary press is composed of a feeder having a roll comprising a web wound in a roll form, a printing unit having printing cylinders, such as blanket cylinders and plate cylinders, for printing the web fed from the feeder, a dryer for drying the web printed by the printing unit, and a folder for folding the web.
  • a feeder having a roll comprising a web wound in a roll form
  • printing unit having printing cylinders, such as blanket cylinders and plate cylinders, for printing the web fed from the feeder
  • a dryer for drying the web printed by the printing unit
  • a folder for folding the web.
  • Japanese Unexamined Patent Publication No. 165400/1999 discloses a technique which provides a wrap preventing member (press roller, dancer roller) on a web travel route between a printing unit and a folder (and between a feeder and the printing unit), the wrap preventing member being designed to retreat during printing and advance during plate changing to contact the web, so that a slack portion of the web is pressed downward and stretched under a certain tension by the wrap preventing member. According to this technique, the slack portion of the web is prevented from swaying toward the blanket cylinder or the plate cylinder during plate changing and being caught between the plate cylinder and the blanket cylinder positioned below the web.
  • a wrap preventing member press roller, dancer roller
  • the drive clutch is engaged after completion of plate changing, and the web is discharged toward the folder.
  • the pressure of the wrap preventing member during plate changing is so high that the web accumulated at the wrap preventing member on the folder side cannot be discharged.
  • the pressure of the wrap preventing member was weakened after completion of plate changing so that the web accumulated at the wrap preventing member can be discharged.
  • the feed amount of the web fed from the feeder (infeed unit), and the feed amount of the web discharged toward the folder are small. Thus, it takes time to discharge the web accumulated at the wrap preventing member. Depending on the paper quality of the web, etc., moreover, the wrap preventing member still fails to ascend.
  • the present invention has been accomplished in consideration of the above problems with the earlier technology. It is the object of the invention to provide a rotary press in which after plate changing is completed, a wrap preventing member can smoothly ascend regardless of its pressure, and can promptly and smoothly return to the state before plate changing.
  • the present invention which attains the above object, is a rotary press for printing a web fed from a feeder by a printing unit, comprising a wrap preventing member provided on a travel route for the web downstream from the printing unit, the wrap preventing member being adapted to retreat during printing and advance during plate changing to contact the web, and a pinching member provided on the travel route for the web between the feeder and the printing unit, the pinching member being adapted to support the web in a pinching manner, wherein the wrap preventing member is movable in a retreating direction by the web, with the web being supported in the pinching manner by the pinching member.
  • the wrap preventing member can smoothly ascend regardless of its pressure, and can promptly and smoothly return to the state in which it was in before plate changing.
  • the wrap preventing member may be a press roller, and may be adapted to move upward and downward in accordance with contraction and extension of an air cylinder for the press roller, the air cylinder being mounted so as to face downward.
  • the air cylinder for the press roller may make a contracting motion when the press roller is detected by a sensor provided at a position at which slackness of the web is small.
  • the press roller may be locked by a locking mechanism when the air cylinder for the press roller is maximally contracted.
  • a second wrap preventing member may be provided on the travel route for the web between the feeder and the printing unit and downstream of the pinching member.
  • the second wrap preventing member may be a second press roller, and may be adapted to move upward and downward in accordance with contraction and extension of an air cylinder for the second press roller, the air cylinder for the second press roller being mounted so as to face downward.
  • the air cylinder for the second press roller may make a contracting motion when the second press roller is detected by a sensor provided at a position at which slackness of the web is small.
  • the second press roller may be locked by a second locking mechanism when the air cylinder for the second press roller is maximally contracted.
  • the pinching member may be composed of a pair of plates, and at least one of the plates may be supported so as to be movable toward and away from the other of the plates.
  • the web may be pinched by the pinching member; with a pinched state of the web being kept, plate changing may be performed by normal and reverse rotations of plate cylinders; after plate changing is completed, the wrap preventing member may be retreated by the web, and then the pinched state of the web by the pinching member may be released.
  • the wrap preventing member may enter into an advancing state after normal rotation of plate cylinders; then, after the plate cylinders are stopped, a second wrap preventing member, provided on the travel route for the web between the feeder and the printing unit and downstream from the pinching member, may be brought into an advancing state; then, with the web being pinched by the pinching member, plate changing may be performed by normal and reverse rotations of the plate cylinders; and after plate changing is completed, the wrap preventing member and the second wrap preventing member may be retreated by the web, and then the pinched state of the web by the pinching member may be released.
  • FIG. 1 is a schematic constitutional drawing of a principal part of a rotary press showing an embodiment of the present invention
  • FIG. 2 is an explanatory drawing of a web presser of the rotary press
  • FIG. 3 is an explanatory drawing of a press roller of the rotary press.
  • FIG. 4 is a process chart showing the order of actions in the rotary press.
  • the rotary press has, in the order of printing, a feeder 1 , an infeed unit 2 , a printing unit 3 for printing a web W fed from the infeed unit 2 , and a dryer 4 for drying the web W printed by the printing unit 3 , and also has a cooler for cooling the dried web W, a web path portion, and a folder, although none of the cooler, web path portion, and folder are shown.
  • a roll 5 consisting of the web W wound in a roll form is present together with a spare roll (not shown).
  • Numeral 10 denotes a tension roller, provided between a pair of guide rollers 6 and 7 arranged in an opposed manner.
  • the tension roller 10 is supported by an air cylinder (not shown) such that the roller 10 freely moves in an upward and downward directions, and is always urged in a downward direction at a constant pressure.
  • the tension roller 10 prevents slackness of the web W fed from the feeder 1 .
  • Numerals 11 and 12 denote a pair of nip rolls. The upper nip roll 11 freely moves in the upward and downward directions by an air cylinder (not shown).
  • Numeral 13 denotes a constant position control roller, which is provided between a pair of guide rollers 8 and 9 arranged in an opposed manner, and is also located below these rollers 8 and 9 to impart a tension to the web W constantly.
  • the printing unit 3 has four printing units 3 a , 3 b , 3 c , and 3 d .
  • Each of these printing units 3 a , 3 b , 3 c , and 3 d is equipped with a pair of blanket cylinders 14 a and 14 b sandwiching the traveling web W, a pair of plate cylinders 15 a and 15 b in contact with the blanket cylinders 14 a and 14 b , and inking devices and dampeners (not shown) for supplying water and ink to the plate cylinders 15 a and 15 b.
  • a first press roller (dancer roller) 20 is provided on a travel route of the web W between the printing unit 3 and the dryer 4 , and is located between a pair of guide rollers 21 and 22 arranged in an opposed manner.
  • the first press roller 20 serves as a wrap preventing member adapted to retreat during printing and advance during plate changing to contact the web W.
  • a second press roller (dancer roller) 23 On the travel route of the web W between the infeed unit 2 and the printing unit 3 , a second press roller (dancer roller) 23 , having the same function as that of the first press roller 20 , is provided between a pair of guide rollers 24 and 25 arranged in an opposed manner.
  • a web presser 26 is provided as a pinching member for supporting the web W in a pinching manner.
  • the first press roller 20 and the second press roller 23 are movable by the web W in a retreating direction, with the web W being supported in a pinched manner by the web presser 26 .
  • the first press roller 20 and the second press roller 23 are each adapted to move upward and downward, while being guided by a guide shaft 28 , between left and right struts 27 a and 27 b as a pair erected on a floor.
  • the upward and downward movements of the press roller 20 or 23 take place in accordance with the contraction and extension of a first air cylinder 29 attached downwardly to the strut 27 b .
  • the first press roller 20 and the second press roller 23 are positioned and fixed (locked), in the most contracted state of the first air cylinder 29 , namely, at the retreat position of the first press roller 20 and the second press roller 23 (see solid lines in FIG. 3 ), by a locking mechanism which is not shown.
  • the locking mechanism is constituted between a connecting member 30 connected to the front end of the piston rod of the first air cylinder 29 , and the second air cylinder 32 attached laterally to the strut 27 b via a bracket 31 .
  • the second air cylinder 32 functions via a controller, etc. (not shown). That is, the second air cylinder 32 is adapted to act responsive to a detection signal from a proximity sensor (not shown) for detecting the top limit position of the connecting member 30 , and extend in the ON-state of the detection signal, thereby performing the aforementioned locking action.
  • the above devices for pressing the web W are constituted in the same manner as the device disclosed in the aforementioned Japanese Unexamined Patent Publication No. 165400/1999. Thus, reference to the relevant disclosure in this publication is requested, and a detailed description of the pressing devices is omitted herein.
  • the web presser 26 is composed of an upper fixed plate 26 a constructed, like a bridge, between left and right struts 33 a and 33 b as a pair erected on the floor, and a lower movable plate 26 b movable toward and away from the upper fixed plate 26 a .
  • Front ends of piston rods of third air cylinders 34 a and 34 b attached downwardly to the struts 33 a and 33 b , respectively, are connected to left and right end portions of the lower movable plate 26 b .
  • the lower movable plate 26 b Upon extension of the third air cylinders 34 a and 34 b , the lower movable plate 26 b approaches the upper fixed plate 26 a to pinch the web W between the lower movable plate 26 b and the upper fixed plate 26 a . Upon contraction of the third air cylinders 34 a and 34 b , the lower movable plate 26 b moves away from the upper fixed plate 26 a to release the web W.
  • the third air cylinders 34 a and 34 b are adapted to act responsive to cylinder phase detection means of the present printing press via a controller, etc. (not shown), and extend at a predetermined time during plate changing (to be described later), thereby performing the above-mentioned pinching action to the web W.
  • rollers and cylinders which constitute the aforementioned feeder 1 , infeed unit 2 , printing unit 3 , and dryer 4 , are connected by a drive shaft (not shown), and driven by a drive motor of the present printing press provided at a side of the feeder 1 .
  • a clutch (not shown) is provided between the printing unit 3 and the folder, and can be engaged or disengaged so as to or not to transmit rotation from the motor for driving the present printing press.
  • a routine printing operation of the so constituted printing press will be described.
  • the nip roll 11 of the infeed unit 2 is in contact with the nip roll 12 , and the blanket cylinders 14 a and 14 b of the printing units 3 a to 3 d are also in contact with each other.
  • the first air cylinder 29 contracts and the press roller 20 and 23 are positioned and fixed at the retreat position shown by the solid lines in FIG. 3 .
  • the second air cylinder 32 extends to make a locking motion.
  • the press rollers 20 , 23 do not advance to the travel route for the web W.
  • the third air cylinders 34 a , 34 b contract, so that the pinching member 26 does not perform a pinching action.
  • a slack portion corresponding to nearly the outer periphery of the plate cylinder 15 a occurs in the web W located between the printing unit 3 and the dryer 4 .
  • the second air cylinder 32 is contracted to release from the locked state, and then the first air cylinder 29 is extended to lower the first press roller 20 , whereby the slackness of the web W is removed.
  • the plate cylinders 15 a , 15 b are stopped. Then, the nip rolls 11 , 12 are brought out of contact in S 7 . If the nip rolls 11 , 12 are actuated in an attempt to make the tension of the web W constant during plate changing, the web W may be torn.
  • the step S 7 is performed to exclude the possibility of this web tearing.
  • the second air cylinder 32 is contracted to release the locked state, and then the first air cylinder 29 is extended to lower the second press roller 20 slightly.
  • the third air cylinders 34 a , 34 b are extended to pinch the web W by the web presser 26 .
  • plate removal starts, the plate cylinders 15 a , 15 b of the printing unit 3 rotate by about one turn in the reverse direction, and the old plate from the plate cylinders 15 a , 15 b is removed. At this time, the web W travels in the direction opposite to the direction of the arrow A.
  • the first and second press rollers 20 and 23 move upward and downward in the opposite directions, so that tearing of the web W ahead of or behind the printing unit 3 can be prevented.
  • the occurrence of slackness is also prevented, so that a slack portion of the web W is not caught by the plate cylinder 15 b or blanket cylinder 14 b during a plate changing operation.
  • the second press roller 23 is provided between the infeed unit 2 and the printing unit 3 , thus making it possible to deal with voluntary amount of slackness occurring between the infeed unit 2 and the printing unit 3 .
  • the ascent position of the press rollers 20 , 23 is detected by the proximity sensors (not shown).
  • the position of detection by the proximity sensors is a position at which the slackness of the web W is small.
  • the first air cylinder 29 is contracted maximally in S 19 to return the press rollers 20 , 23 to the retreat position.
  • the second air cylinder 32 extends to lock the press rollers 20 , 23 at the retreat position.
  • the third air cylinders 34 a , 34 b are contracted to release the web W from the pinching member 26 .
  • the plate changing operation is completed.
  • the first air cylinder 29 may be placed below the web W so as to face upward, and may be extended to bring the press rollers 20 , 23 upward.
  • the third air cylinders 34 a , 34 b may be arranged above the web W so as to face downward, and may be extended to pinch the web W by the pinching member 26 .
  • the press rollers 20 , 23 and the web presser 26 (upper fixed plate 26 a , lower movable plate 26 b ) need not be elongated continuously in the axial direction, but may be divided into a plurality of parts in the axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Replacement Of Web Rolls (AREA)
  • Advancing Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US09/851,315 2000-05-11 2001-05-09 Rotary press Expired - Lifetime US6662721B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-138334 2000-05-11
JP2000138334A JP4642969B2 (ja) 2000-05-11 2000-05-11 輪転印刷機

Publications (2)

Publication Number Publication Date
US20010047727A1 US20010047727A1 (en) 2001-12-06
US6662721B2 true US6662721B2 (en) 2003-12-16

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US09/851,315 Expired - Lifetime US6662721B2 (en) 2000-05-11 2001-05-09 Rotary press

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US (1) US6662721B2 (ja)
EP (1) EP1153744B1 (ja)
JP (1) JP4642969B2 (ja)
AT (1) ATE290953T1 (ja)
DE (1) DE60109351T2 (ja)
ES (1) ES2240274T3 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070175346A1 (en) * 2006-02-02 2007-08-02 Goss International Americas, Inc. Reverse air flow web stabilizer
US20080264995A1 (en) * 2007-04-26 2008-10-30 Nissim Henn Buffering And Tension Control System And Method
US20110293347A1 (en) * 2010-05-31 2011-12-01 Toshiba Tec Kabushiki Kaisha Paper discharge apparatus, paper discharge method, image forming apparatus and image forming method
US20120010061A1 (en) * 2010-07-12 2012-01-12 Toshiba Tec Kabushiki Kaisha Paper discharge apparatus, paper discharge method, image forming apparatus and image forming method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004074642A (ja) * 2002-08-20 2004-03-11 Komori Corp 輪転印刷機
DE102009021551A1 (de) * 2009-05-15 2010-11-25 Edelmann Graphics Gmbh Druckmaschine
JP5717358B2 (ja) * 2010-05-21 2015-05-13 株式会社ミヤコシ 輪転印刷機
CN102947095B (zh) * 2010-06-24 2016-07-06 惠普发展公司，有限责任合伙企业 卷筒印刷机和进行双面印刷的方法
CN110014749B (zh) * 2013-07-31 2021-02-09 惠普发展公司，有限责任合伙企业 卷筒印刷机印刷***和方法
CN113858790A (zh) * 2021-11-04 2021-12-31 盐城工业职业技术学院 一种用于纺织材料的直线式印刷***
CN114953710B (zh) * 2022-05-13 2023-09-05 陕西烟印包装科技有限责任公司 一种柔版印刷机

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE542952C (de) 1931-04-22 1932-02-05 Aeg Papierbahnfuehrung fuer Rotationsdruckmaschinen mit Mehrmotorenantrieb
JPS61144350A (ja) 1984-12-19 1986-07-02 Toppan Printing Co Ltd 輪転機印刷機に於る版及びインキ換え方法
DE8425540U1 (de) 1984-08-29 1987-02-26 Kotterer, Werner J., 8901 Diedorf Druckmaschine mit einer Vorrichtung zum Verhindern maschinenschädigender Wickler
EP0384385A2 (de) 1989-02-22 1990-08-29 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Vorrichtung zur Veränderung der Bahnlage einer Bedruckstoffbahn
EP0416389A2 (de) 1989-09-02 1991-03-13 Koenig & Bauer Aktiengesellschaft Papierbahntrenn- und -halteeinrichtung
US5996492A (en) * 1997-03-26 1999-12-07 Heidelberg Druckmaschinen Aktiengesellschaft Method and apparatus for regulating web tension in a web-fed rotary offset printing press
US6357349B1 (en) * 2000-07-05 2002-03-19 Roll Systems, Inc. Web tensioning and aligning module

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3926931B2 (ja) * 1997-10-03 2007-06-06 株式会社小森コーポレーション 輪転印刷機

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
DE542952C (de) 1931-04-22 1932-02-05 Aeg Papierbahnfuehrung fuer Rotationsdruckmaschinen mit Mehrmotorenantrieb
DE8425540U1 (de) 1984-08-29 1987-02-26 Kotterer, Werner J., 8901 Diedorf Druckmaschine mit einer Vorrichtung zum Verhindern maschinenschädigender Wickler
JPS61144350A (ja) 1984-12-19 1986-07-02 Toppan Printing Co Ltd 輪転機印刷機に於る版及びインキ換え方法
EP0384385A2 (de) 1989-02-22 1990-08-29 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Vorrichtung zur Veränderung der Bahnlage einer Bedruckstoffbahn
US5003889A (en) 1989-02-22 1991-04-02 Man Roland Druckmaschinen Ag Rotary printing machine system with a web path changing arrangement
EP0416389A2 (de) 1989-09-02 1991-03-13 Koenig & Bauer Aktiengesellschaft Papierbahntrenn- und -halteeinrichtung
US5996492A (en) * 1997-03-26 1999-12-07 Heidelberg Druckmaschinen Aktiengesellschaft Method and apparatus for regulating web tension in a web-fed rotary offset printing press
US6357349B1 (en) * 2000-07-05 2002-03-19 Roll Systems, Inc. Web tensioning and aligning module

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Druckplattenwechsel-auch ohne Papierbahntrennung," DEUTSCHER DRUCKER, vol. 28, No. 35, Sep. 17, 1992, pp. w8-w11, XP000306697, Ostfildern(Ruit) (without translation).
"Druckplattenwechsel—auch ohne Papierbahntrennung," DEUTSCHER DRUCKER, vol. 28, No. 35, Sep. 17, 1992, pp. w8-w11, XP000306697, Ostfildern(Ruit) (without translation).

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070175346A1 (en) * 2006-02-02 2007-08-02 Goss International Americas, Inc. Reverse air flow web stabilizer
WO2007092128A3 (en) * 2006-02-02 2008-01-10 Goss Int Americas Inc Reverse air flow web stabilizer
US20100122637A1 (en) * 2006-02-02 2010-05-20 Goss International Americas, Inc. Reverse Air Flow Web Stabilizer
CN103612479A (zh) * 2006-02-02 2014-03-05 高斯国际美洲公司 反向气流卷材稳定器
US20080264995A1 (en) * 2007-04-26 2008-10-30 Nissim Henn Buffering And Tension Control System And Method
US8720333B2 (en) * 2007-04-26 2014-05-13 Hewlett-Packard Development Company, L.P. Buffering and tension control system and method
US20110293347A1 (en) * 2010-05-31 2011-12-01 Toshiba Tec Kabushiki Kaisha Paper discharge apparatus, paper discharge method, image forming apparatus and image forming method
CN102328843A (zh) * 2010-05-31 2012-01-25 东芝泰格有限公司 排纸装置、排纸方法、图像形成装置和图像形成方法
US20120010061A1 (en) * 2010-07-12 2012-01-12 Toshiba Tec Kabushiki Kaisha Paper discharge apparatus, paper discharge method, image forming apparatus and image forming method
US8721207B2 (en) * 2010-07-12 2014-05-13 Toshiba Tec Kabushiki Kaisha Paper discharge apparatus, paper discharge method, image forming apparatus and image forming method

Also Published As

Publication number Publication date
EP1153744B1 (en) 2005-03-16
ATE290953T1 (de) 2005-04-15
JP4642969B2 (ja) 2011-03-02
DE60109351D1 (de) 2005-04-21
JP2001315296A (ja) 2001-11-13
EP1153744A1 (en) 2001-11-14
US20010047727A1 (en) 2001-12-06
ES2240274T3 (es) 2005-10-16
DE60109351T2 (de) 2006-04-13

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